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    Closed: Re: Circuit to pulse from 1v to 1.1v repeatedly.

    Not sure, at least several mV.

    To implement a BJT analog switch with zero offset voltage, operate the transistor inversely. Disadvantage is current gain of about unity.
  2. Closed: Re: Does PIC16F18856 work if centre pad is left floating?

    As a first step towards clarity, you can measure if the two VSS pins and center pad have low R connection.

    Connecting as many VSS pins as available reduces ground bounce and EMI susceptibility and...
  3. Closed: Re: What is the difference between IRF510 and IRF510N?

    IRF510 has been discontinued by IRF/Infineon since many years but is still stocked at catalog distributors. I never saw an IRF510N type made by IRF. Can you show me a datasheet or official catalog?
    ...
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    Closed: Re: output of the circuit

    No positive feedback. MOSFET in CS configuration is inverting the signal, thus overall negative feedback. Practical problem is gain in feedback path, not stable with universally frequency compensated...
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    Closed: Re: output of the circuit

    Expect the positive half wave copied to Vout. No oscillator feature.

    Connecting a real OP brings up stability issues, apparently beyond your scope.
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    Closed: Re: output of the circuit

    No useful question without specifying the OP parameters. Too many possible answers.

    What do you exactly mean with "oscillatory" in this context?
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    Closed: Re: How drive 200pF load on 15MHz?

    I forgot to mention that there may be also a save operation area problem when operating the small gates at 15 MHz with large C load. Multiple 74HC gates isn't that bad at all. Or use a small CMOS...
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    Closed: Re: Multiple relay with controllers

    For correct shift register operation, the clock signal has to to fulfill the maximum rise/fall time requirements of HC logic family. A standard opto coupler probably can't guarantee this, high load...
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    Closed: Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Some explanation are unnecessarily complicated, I think. The keyword is orthogonality.

    Sine signals of different frequency (also freq=0, DC) are orthogonal. Their generated power adds linearly,...
  10. Closed: Re: What's the difference between stacked and cascode configurations?

    No. In the previous thread, it's just the other way round.

    Quite clearly, usual cascode configuration has the second (or possibly third) stage in CG, gate grounded. Apparently the author refers...
  11. [SOLVED]Closed: Re: LM741 Amplifier not working with IR2110 IC [PROTUES]

    Something between 95 and 99%. There's no big advantage of increasing it above 95%.
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    Closed: Re: How drive 200pF load on 15MHz?

    Single gate driver like LVC1G04 has about 10 ohms output impedance. Two in parallel should work. Or single LVC2G.
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    Closed: Re: How drive 200pF load on 15MHz?

    You forgot to tell the intended rise and fall time.
  14. Closed: Re: RF Mosfet Class E PA for Dummies or absolute idiots

    MOSFET Coss always decreases with rising Vds.

    - - - Updated - - -

    See this IXYS application note for 13.56 MHz class E PA. http://ixys.com/Documents/AppNotes/CO1.pdf
    It's using series resonant...
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    Closed: Re: Design a driver for DFB laser

    I moved the thread to Analog Circuit Design section because it's only marginally related to microcontrollers.

    The wavelength of a DFB laser can be varied in very narrow limits by modulating the...
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    Closed: Re: Hand soldering a 6x6mm QFN (28pin)

    As already mentioned, the exposed pad should be connected to VSS.

    QFN ML package is relative large technology and can be easily reflow soldered with hobby and small business techniques....
  17. Closed: Re: fully differential opamp' s output is not symmetrical

    Apparently an AC coupled test setup. Looks like normal operation.
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    Closed: Re: I cannot power that pelletier module

    It's generally no good idea to operate a peltier element with fixed voltage supply because for each combination of heat sink thermal resistance, ambient temperature and pumped power there's an...
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    Closed: Re: Generating a frequncy

    555 datasheet has application circuits and formulas for pulse width and frequency calculation.

    As for the 27 MHz generation, I was expecting a frequency stable sine oscillator (e.g. crystal based)...
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    Closed: Re: I cannot power that pelletier module

    Do you have a full datasheet with I/V/ΔT curves? What's the expected hot side temperature for -30° cold side? Did you check the actual temperature?

    Most likely problem is insufficient heat...
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    Closed: Re: Generating a frequncy

    Have a 555 circuit generating the modulation waveform and a 27 MHz crystal oscillator enabled by the pulse signal. 8 cm is rather short for 11m wavelength, don't expect large antenna efficiency.
  22. [SOLVED]Closed: Re: LM741 Amplifier not working with IR2110 IC [PROTUES]

    The design fault is to connect VDD to 12V, with 5V supply, the IR2110 logic inputs can be driven by processor signals directly.
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    Closed: Re: Stable PWM during Voltage Loss

    This sounds rather confused. Buffering the controller supply for 50 ms shouldn't be a problem, how 5 A and 50 mF come into play?
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    Closed: Re: Problem with my echo circuit using PT2399

    The standard PT2399 application circuit is sending the low-pass filtered original signal to the output, that's not appropriate for an echo effect connected to the effect send and return of a mixing...
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    Closed: Re: what's the rf cavity filter tuning principle

    Your colored hand sketched annotation of the drawing makes no sense, particularly the blue circle around a coupling slit. There's no tuning bolt in this position.

    Why don't you provide a readable...
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